Prasanna Kulkarni: Marketing Data Science 🔬 | Python 🐍

How to prepare a Digital Ocean Droplet for Django

Goals - Host a Django website and database for under $7 per month

Setup a Django project on a Digital Ocean Droplet
Install required packages using a shell script
Install and configure database on the droplet itself to not have to pay for any other database.

Steps

These are the steps I followed to setup a Django project on a Digital Ocean Droplet. I come back to this page every time I need to setup a new project for now. The postgres setup part is not very elaborate, I had searched online for answers and I got it.

Ok so here we go...

Create a droplet on digitalocean
Run below seed.sh script https://prasannakulkarni.com/seed.html

#!/bin/bash
echo Hello World! I am a shell script. Run on your server. Google about it.
cmd="sudo apt-get update && sudo apt-get upgrade -y"

get_ready()
{
    sudo apt-get update -y
    sudo apt-get upgrade -y
    sudo apt-get install \
        apache2 \
        apt-transport-https \
        ca-certificates \
        curl \
        gnupg-agent \
        gnupg \
        lsb-release \
        python3-pip \
        python3-venv \
        software-properties-common -y
    sudo mkdir -p /etc/apt/keyrings
    curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo gpg --dearmor -o /etc/apt/keyrings/docker.gpg
    echo \
    "deb [arch=$(dpkg --print-architecture) signed-by=/etc/apt/keyrings/docker.gpg] https://download.docker.com/linux/ubuntu \
    $(lsb_release -cs) stable" | sudo tee /etc/apt/sources.list.d/docker.list > /dev/null
    sudo apt-get update
    sudo chmod a+r /etc/apt/keyrings/docker.gpg
    sudo apt-get update
    sudo apt-get install docker-ce docker-ce-cli containerd.io docker-compose-plugin -y
    sudo apt install postgresql postgresql-contrib -y
    sudo systemctl start postgresql.service
    sudo apt install net-tools -y
    sudo apt-get
    update-rc.d postgresql enable
    service postgresql start
    service postgresql status
    python3 -m venv venv
    source venv/bin/activate
    pip3 install -r requirements.txt
}

open_ports()
{
    sudo ufw allow http
    sudo ufw allow https
    sudo ufw allow OpenSSH
    sudo ufw allow 5432/tcp
    sudo ufw enable -y
}

open_ports
get_ready

Install gh https://github.com/cli/cli#installation
login to gh `gh auth login`
`gh repo clone etherator-xyz/pop_djangocrawler`
postgres setup

find postgresql.conf, and change listen_addresses to '*' Now restart postgresql server. In order to fix it, open pg_hba.conf and add following entry at the very end to fix it.

Use below dockerfile for your django project with modifications as per your use case

FROM python:3.7.4-alpine3.10

ADD mysitedjango/requirements.txt /app/requirements.txt

RUN set -ex \
    && apk add --no-cache --virtual .build-deps postgresql-dev build-base python3-dev libffi-dev\
    && python3 -m venv /env \
    && /env/bin/pip3 install --upgrade pip \
    && /env/bin/pip3 install --no-cache-dir -r /app/requirements.txt \
    && /env/bin/pip3 install algoliasearch-django \
    && /env/bin/pip3 install typesense \
    && runDeps="$(scanelf --needed --nobanner --recursive /env \
        | awk '{ gsub(/,/, "\nso:", $2); print "so:" $2 }' \
        | sort -u \
        | xargs -r apk info --installed \
        | sort -u)" \
    && apk add --virtual rundeps $runDeps \
    && apk del .build-deps

ADD mysitedjango /app
WORKDIR /app

ENV VIRTUAL_ENV /env
ENV PATH /env/bin:$PATH

EXPOSE 8000

CMD ["gunicorn", "--bind", ":8000", "--workers", "3", "mysiteDjango.wsgi:application"]

build image & run the image

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